1. Department of Crop Sciences and Agroforestry, Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague, Czech Republic
2. Department of Plant Protection Biology, Swedish University of Agricultural Sciences, SE-230 53 Alnarp, Sweden
3. Facultad de Agronomía, Universidad de San Carlos de Guatemala, Guatemala City 010012, Guatemala
4. Higher Institute of Environmental Sciences (HIES), Yaounde P.O. Box 16317, Cameroon
5. World Agroforestry Centre (CIFOR-ICRAF) Cameroon, Derrière Usine Bastos, Yaounde P.O. Box 16317, Cameroon
6. Laboratory of Tropical and Subtropical Agriculture and Ethnobotany, Department of Plant Production, Faculty of Bio-Science Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium